The Collaborative International Dictionary of English v.0.48:

Precontract \Pre`con*tract"\, v. i.
   To make a previous contract or agreement. --Ayliffe.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Precontract \Pre*con"tract\, n.
   A contract preceding another; especially (Law), a contract of
   marriage which, according to the ancient law, rendered void a
   subsequent marriage solemnized in violation of it. --Abbott.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Precontract \Pre`con*tract"\, v. t. [imp. & p. p.
   Precontracted; p. pr. & vb. n. Precontracting.]
   To contract, engage, or stipulate previously.
   [1913 Webster]